Some day, in my wildest dreams, a Mimiron's Head may pop up on my BMAH. I am willing to bid gold cap on it to be sure that I get it but something occurred to me. The bid increment keeps climbing. 10k item? Bid at least 500 more. Someone outbid you? Now you have to bid 1000. (Those aren't the actual numbers but you get what I'm saying.)
So then if it's percentage based is there a number I can bid under gold cap (Say, 600k or whatever) that makes it so that the minimum bid is over gold-cap, thus not able to be reached and thus I am not able to be outbid?